''It's life, Jim, but not as we know it''. Those immortal lines uttered by ''Bones'' McCoy on 60s sci-fi show, Star Trek. Those Trekkies amongst you will remember he was surgically rendering the wound of a giant silicon-based mole with masonry plaster - bish, bosh, sorted! It showed imagination on the part of the creators to cast a lump of animated rock as intelligent life. Since Roswell, most of us by now have that stereotypical green, lozenge-faced, lollipop creep with the large, black almond eyes firmly fixed in our psyche. Sure, before that artist's impression appeared in the press, ET came in all shapes and sizes, but common folk believe what they see in their papers and now we all know what to expect - old spooky head!
Anyway,...